Lauritzen Gardens in Omaha has done the same thing. Usually it's outdoors but this week it's inside in conjunction with the poinsettia show. My wife and I went this morning and saw some very beautiful poinsettias.
Here's a couple pictures I took today.
20ft. Poinsettia Tree:
Lauritzen Gardens building:
First National Bank Tower (on left), Woodmen of the World Tower (on right)